Luminescence spectroscopy of europium(III) nitrate, chloride, and perchlorate in mixed ethanol-water solutions

Journal Article · Wed Apr 27 04:00:00 EDT 1994 · Inorganic Chemistry; (United States)

DOI:https://doi.org/10.1021/ic00087a041· OSTI ID:7070715

Lochhead, M J; Wamsley, P R; Bray, K L ^[1]

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1. Univ. of Wisconsin, Madison, WI (United States)

A detailed study of the luminescence properties of europium(III) nitrate, chloride, and perchlorate in mixed ethanol-water solutions has been performed. Eu[sup 3+] ion concentrations were varied from 0.05 to 0.5 M, and solutions ranging from aqueous to those with an ethanol/water molar ratio of 57 were investigated. Luminescence spectra and lifetimes have been used to identify inner-sphere interactions between Eu[sup 3+] and the counterion of the salt in solution. The frequency of the [sup 5]D[sub 0] [yields] [sup 7]F[sub 0] transition was used to identify different inner-sphere nitrate ions have been observed. Lifetimes of the europium nitrate solutions ranged from 110 to 380 [mu]s, with the longer lifetimes corresponding to solutions with a higher ethanol/water ratio and a larger number of inner-sphere nitrate ions. In the europium chloride solutions, an increased inner-sphere interaction of the chloride ion was observed as the ethanol/water ratio was increased. Lifetimes of these solutions ranged from 110 to 190 [mu]s. Studies of europium perchlorate ethanol-water solutions indicate that the perchlorate ions do not enter the inner coordination sphere. The results of this study have particular application to the optical characterization of the sol-gel process using Eu[sup 3+] as a luminescent probe.

• OSTI ID: 7070715
• Journal Information: Inorganic Chemistry; (United States), Journal Name: Inorganic Chemistry; (United States) Vol. 33:9; ISSN 0020-1669; ISSN INOCAJ
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
ALCOHOLS
AQUEOUS SOLUTIONS
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
ETHANOL
EUROPIUM CHLORIDES
EUROPIUM COMPOUNDS
EUROPIUM NITRATES
EUROPIUM PERCHLORATES
HALIDES
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
LIFETIME
LUMINESCENCE
MIXTURES
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PERCHLORATES
RARE EARTH COMPOUNDS
SOLUTIONS